Cooling Water Flow Meter
Primary Cooling Mains and Data-Center Liquid-Cooling Build
Accuracy +/- 0.5% of rate
Line sizes 2″ to 12″ (DN50 to DN300)
Pressure up to 25 MPa
- 304 stainless body standard
- Large-bore primary cooling mains
- DCIM and chiller-controller integration
Cooling water flow meters play a key role in data-center primary cooling, HVAC chiller-plant headers, industrial cooling-tower mains, and power-plant condenser water primary monitoring. The LWGY large-bore version covers Line sizes 2″ to 12″ (DN50 to DN300) on primary cooling mains. The 304 stainless body is standard for closed-loop chilled and chiller-plant service; 316L upgrade for chloride-prone open-loop tower water; duplex on application review for coastal sites.
Benefits
- Line sizes 2″ to 12″ (DN50 to DN300) primary cooling mains
- 304 stainless standard, 316L chloride upgrade
- Pressure up to 25 MPa for high-pressure cooling circuits
- Accuracy +/- 0.5% of rate
- Pulse output for chiller controllers and data-center DCIM
- Glycol-water blend handling (30% mix at 1.2 to 2.5 cSt)
Typical applications
Four large-bore primary cooling applications where LWGY turbine handles the inline mechanical role distinct from clamp-on ultrasonic retrofit and EMF open-loop tower service.
💻
Data-center primary cooling loop
DN150–DN300 chiller-to-CDU/CRAH loops; pulse to DCIM for PUE/TUE; 304 body on treated closed-loop water.
🎒
HVAC chiller-plant primary header
DN150–DN250 campus headers; pulse to BMS for ISO 50001 sub-measurement and chiller-stage sequencing.
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Industrial cooling-tower primary loop
DN100–DN300 tower mains; 316L for chloride carry-over; pulse to DCS for cycle-of-concentration and biocide dosing.
⚡
Power-plant condenser water intake
DN200–DN300 once-through/closed-loop; 304 treated, 316L coastal seawater; supports heat-rate calc.
Specifications
| Measurement principle | Velocity-type turbine with magnetic-pickup pulse output |
|---|---|
| Standard | JB/T9246-2016 turbine flow sensor |
| Line sizes | 2″ to 12″ (DN50 to DN300); large-bore primary cooling mains |
| Accuracy | +/- 0.5% of rate standard (custody class) |
| Repeatability | +/- 0.1% of rate |
| Pressure | Pressure up to 25 MPa (3,625 psi); ANSI 150 / 300 / 600 / 900 / 1500 / 2500 LB |
| Compatible media | Data-center primary cooling loop water (18 to 25 °C, 1.0 cSt) · HVAC chilled water (6 to 12 °C, 1.3 cSt) · HVAC condenser water (25 to 35 °C, 0.78 cSt) · industrial cooling-tower primary · power-plant condenser cooling water · glycol-water cooling blends (30 % typical, 1.2-2.5 cSt) |
| Temperature Application | −20 to +120 °C (room-temperature type, standard) covers cooling-water service 6 to 35 °C · −40 to +180 °C (high-temperature type) for sub-zero glycol-water service below −20 °C |
| Ambient temperature | −20 to +65 °C |
| Body material | 304 stainless standard for closed-loop chilled and chiller-plant primary water · 316L upgrade for chloride-prone open-loop tower water and brackish coastal makeup · duplex on application review for high-chloride coastal sites |
| Impeller | 2Cr13 martensitic stainless standard for closed-loop service · 430F ferritic alternative · duplex stainless for chloride carry-over from open-loop tower service · ceramic high-RPM option |
| Bearing | Tungsten carbide standard, ceramic high-RPM option for high-flow primary mains |
| Output signals | Pulse 3-wire, 4-20 mA 2-wire / 4-wire, RS-485 Modbus RTU, HART, GPRS / IoT |
| Power supply | 24 V DC standard for primary-loop installs (typical chiller-plant and data-center primary have permanent power) |
| Transmission distance | Pulse 3-wire ≤ 300 m, 4-20 mA ≤ 1500 m (load ≤ 500 Ω), RS-485 / HART ≤ 1200 m |
| Ingress protection | IP65 / IP66 / IP67 |
| Connection | Flanged ANSI 150 to 2500 LB standard for DN50+; threaded G2 to G4-1/2 available DN50 to DN100 |
| Approvals | JB/T9246-2016, EMC 2014/30/EU (Annex II), ISO 9001 calibration certificate with each meter |
Installation
Key install requirements. Full datasheet on request.
- Locate on pump-discharge side; align flow arrow with line flow
- Install upstream strainer; slow-fill at first commissioning
- Maintain ≥ 10 D upstream and ≥ 5 D downstream straight pipe
- Horizontal mount preferred on large-bore DN150 and above
- Inspect impeller every 6 months; every 3 months on open-loop tower service
Frequently asked questions
What is a cooling water flow meter and how does it work?+
A cooling water flow meter measures volumetric flow through a free-spinning rotor. The LWGY large-bore version covers Line sizes 2″ to 12″ (DN50 to DN300) primary cooling mains for data-center liquid cooling, HVAC chiller-plant headers, industrial cooling towers, and power-plant condenser water. 304 stainless body standard for closed-loop chilled service.
When does turbine beat ultrasonic and electromagnetic for cooling water?+
Turbine fits primary cooling mains where buyers want inline mechanical metering with integrated transmitter and PLC pulse output. Choose turbine for new-build primary cooling, large-bore DN150 to DN300 chiller-plant headers, and data-center primary loops with factory-calibrated K-factor. Choose clamp-on ultrasonic for retrofit; EMF for conductive open-loop tower water with debris.
What cooling-water service falls outside this LWGY large-bore page?+
Small-bore secondary branches and chiller-loop returns below DN50; go to the LWGY water turbine flow meter (DN15 to DN200). Clamp-on retrofit on existing pipe; go to a future LWGY ultrasonic build. Open-loop cooling-tower water with suspended solids and biocide debris; go to electromagnetic (LEA). Hot district-heating return above 100 °C uses the hot-water turbine flow meter high-temperature type.
What pipe sizes and pressure classes fit data-center and HVAC chiller-plant primary?+
DN50 to DN100 covers HVAC chiller-plant primary headers, packaged-chiller condenser inlets, and edge-data-center loops. DN150 to DN200 covers central HVAC distribution, hyperscale data-center cooling loops, and industrial cooling-tower mains. DN250 to DN300 covers hyperscale primary cooling and power-plant condenser intake. Pressure up to 25 MPa for high-pressure cooling circuits.
How does pulse output integrate with chiller controllers and DCIM?+
The 3-wire pulse output is frequency-proportional to flow with the calibrated K-factor on each meter’s certificate. Siemens Desigo, Trane Tracer, and Johnson Metasys building automation accept the K-factor for chilled-water plant reporting. Schneider EcoStruxure IT, Vertiv Trellis, and Sunbird dcTrack DCIM ingest the pulse stream for PUE / TUE calculation. RS-485 Modbus and HART are also available.
How does the meter handle glycol-water blends on chilled-water service?+
Glycol-water blends (30% propylene-glycol or ethylene-glycol on chilled-water service below 5 °C) sit at 1.2 to 2.5 cSt, inside the LWGY ≤ 10 cSt range. The 304 body and 2Cr13 impeller handle glycol chemistry without leaching. K-factor calibration covers the glycol concentration and temperature pair at order entry. 50% glycol below 0 °C runs 5 to 8 cSt; still in range but flag at order.
What is the lead time and what certifications ship standard?+
Lead time is 5–7 business days from order confirmation on standard configurations DN50 to DN200. Large-bore DN250 and DN300 confirm window at order entry. Each meter ships with an ISO 9001 calibration certificate listing K-factor, calibrated DN, and tested flow range. EMC 2014/30/EU and IP65 / IP66 / IP67 are selectable. JB/T9246-2016 is the underlying standard.
Need help sizing a primary cooling build?
Send line size, application, temperature/pressure, glycol if any, and flow range—sized model code returns within one business day.